Answer:
Rotation would be if the triangle is labeled with 4 numbers or letters and your able to move the orringinal triangle to the other spot exactly where the other triangle is. Reflection would be if it is perfectly the same on every aspect of the triangle. Translation would be if it can move up left right or down but it is not able to turn at all. Dialation would be if the preimage and the orriginal image are not the same size.
Explanation:
I am not 100% sure that my explanation is correct.